High sensitivity: When two electrodes on the bottom come into contact with water/liquid, a loud 90dB alarm will be emitted immediately to remind you to prevent water wastage or flooding effectively Easy to use: no wiring , no buttons, no programming, can be wall mounted or placed on the floor. Just flip off the cover and install the battery Built to last: Made from durable ABS plastic that is strong and lightweight so it floats on water and doesnt need water to get into the internal electronic parts Energy Saving: Powered by 1 x 6F22 9V battery (not included included), which consumes very little electricity and can last one year for your home security. The battery can be changed when the alarm sound is quiet (no warning message when the battery is empty) Areas of application: This product is often used where water can escape. Just set your water alarm near bathroom, kitchen, basement, garage, boat, water pipe. You can fight flood or water leak in time to protect your belongings Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store